The defender was the surprise hero after being moved up the pitch in a desperate move by Barca with Girona clinging on at 1-1.
He came on as a late substitute in an unfamiliar position up front and managed to score the winning header to delight the crowd at the fans at Camp Nou
Speaking after the match, the Uruguayan said the most important thing was for the team to get the win but admitted he was delighted to have played such a critical role in grabbing three points.
"It was important to get the three points ahead of this week's big La Liga game (against Real Madrid on 26 October), he said.
"To be honest, it was a tough game for us. Girona stood up to us and played very well. They had a lot of chances, but the important thing is that the team showed desire and character until the end.
"We knew we were coming off two tough defeats, but with hunger and hard work, we knew we could get the win today.
"Looking ahead to this week, with the Champions League as well, it's important to go in with confidence.
"After a win, everything changes and you work differently.
"Everyone knows I used to play as a striker. I think if I played as a striker, I could score a lot more goals (laughs). When the coach asked me, I didn't hesitate to say yes.
"When I got there to put on the shirt, I said, 'If I go on, I'll score,' and everyone laughed afterwards when I did. I work to be able to play for the team, so I'm happy about that," he concluded.
Barcelona face a critical week with a depleted squad, as Hansi Flick will be without Raphinha and Ferran Torres for Tuesday’s Champions League match against Olympiacos - and possibly for Sunday’s El Clasico against Real Madrid.
Frenkie de Jong has spoken candidly about his emotional battle through injury, uncertainty, and constant speculation before finally renewing his contract with Barcelona until 2029 this week.
Barcelona have confirmed that forward Ferran Torres will miss the club's upcoming La Liga fixture against Girona, as the team returns to action following the October international break.
Barcelona defender Eric Garcia has confirmed that negotiations are underway with the Catalan giants over a new contract, as he looks to secure his long-term future at the club.
